*: Update to libp2p v0.21.1 (#6559)

* *Cargo.toml: Update versions

* client/network/src/discovery: Adjust to Kademlia  API changes

* client/network: Adjust to one_shot.rs changes

* client/network/discovery: Log address list on trace level

* client/network/discovery: Ignore RoutablePeer and PendingRoutablePeer

* Commit Cargo.lock

* Finish update

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

substrate/bin/node/browser-testing/Cargo.toml

@@ -8,7 +8,7 @@ license = "Apache-2.0"
 
 [dependencies]
 futures-timer = "3.0.2"
-libp2p = { version = "0.20.1", default-features = false }
+libp2p = { version = "0.21.1", default-features = false }
 jsonrpc-core = "14.2.0"
 serde = "1.0.106"
 serde_json = "1.0.48"